---
product_id: 2166671
title: "445815"
brand: "extech instruments"
price: "€ 179.00"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.at/products/2166671-445815
store_origin: AT
region: Austria
---

# Triple LCD display: humidity, temp, dew point Programmable high/low humidity alarms Precision field calibration for lasting accuracy 445815

**Brand:** extech instruments
**Price:** € 179.00
**Availability:** ✅ In Stock

## Summary

> 🌡️ Master your microclimate with precision and style!

## Quick Answers

- **What is this?** 445815 by extech instruments
- **How much does it cost?** € 179.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/2166671-445815)

## Best For

- extech instruments enthusiasts

## Why This Product

- Trusted extech instruments brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Stay Ahead of Moisture Risks:** Customizable audible & visual alerts keep your environment in the perfect humidity zone—no surprises, just control.
- • **Pro-Level Accuracy That Lasts:** Built-in calibration lets you fine-tune readings anytime, ensuring reliable data year after year.
- • **All-in-One Environmental Dashboard:** Large triple display shows humidity, temperature, and dew point simultaneously for instant, comprehensive insights.
- • **Remote Probe for Hard-to-Reach Spots:** 18-inch cable lets you measure humidity inside enclosures, ductwork, or behind walls without moving the main unit.
- • **Versatile Placement, Maximum Convenience:** Use the swivel stand or wall mount bracket to seamlessly integrate this monitor into any space or setup.

## Overview

The Extech 445815 Hygro-Thermometer is a professional-grade digital humidity monitor featuring a triple LCD display for humidity, temperature, and dew point. It offers programmable high/low humidity alarms with audible and visual alerts, precision field calibration for long-term accuracy, and an 18-inch remote probe for flexible monitoring. Designed for home, greenhouse, lab, and office use, it includes versatile mounting options and max/min memory tracking to protect sensitive environments from moisture damage.

## Description

Product Description The Extech 445815 Humidity Alert II is not just a standard weather gauge; it is a proactive environmental monitoring system designed to protect your sensitive assets from moisture damage. Whether you are managing a lush indoor greenhouse, fighting dampness in a residential basement, or maintaining strict climate protocols in a laboratory, this Hygro-Thermometer delivers the professional-grade accuracy and timely alerts you need. What sets this meter apart is its programmable %RH alarm system. Instead of constantly checking the screen, you can set custom high and low humidity thresholds. If the environment strays outside your safe zone, the device triggers both an audible beeper and a flashing LED, allowing you to react quickly before condensation or mold can take hold. Paired with a precision remote probe on an 18-inch cable, you can easily monitor closed spaces, ductwork, or incubators while keeping the large, easy-to-read triple LCD display right where you can see it. Additionally, the Extech 445815 continuously calculates and displays the dew point—a critical metric for preventing surface condensation during HVAC testing or painting projects. With built-in Max/Min memory tracking and versatile mounting options for both desktops and walls, this all-in-one climate tracker gives you total visibility into your indoor atmosphere. From the Manufacturer The Extech 445815 Humidity Meter with Alarm and Remote Probe is an attractive humidity meter, which features large triple display of relative humidity, temperature and dew point. Built-in stand for setting on a desk or can be mounted to a wall with included bracket. A visual and audible alarm warns when the humidity level goes above or below the adjustable set point. Also stores the maximum and minimum reading. Remote probe extends 18" for measuring behinds walls. Ideal for use in humid areas where mold can become a problem. Comes complete with built-in stand, wall mount bracket, and 2- AAA batteries.

Review: Have two, have been using both for years and years - We have two and have used them for years to measure both dryness and moisture. The readings differ by just a little bit. I think I returned a third one for being much further off calibration, so it may take a couple rounds when you purchase these. The device allows detach the sensor from the base and thus some ability to measure into places slightly distant from the base. Mostly, though, they reside on furniture and measure ambient air humidity. It does a good job of supplementing my dehumidifier readings as well, as those dehumidifier readings can be way off.
Review: Perfect Indicator - Purchased this instrument to monitor the humidity in our closets and walk-in closet in our home. Some of the rooms within our house have more mildew than others. Took comparison readings of the different rooms and closets. Tried the heating rods in the closets to determine whether these rods help in lowering the relative humidity. Tried running the central A/C system on DRY mode in one of the bedrooms to see whether the A/C works in lowering the RH (relative humidity) and it does. Love the large digital readout and simplicity of use. Moved the instrument among the closets in different rooms of the house to get an idea of the humidity in these areas and to confirm the likelihood and severity of moisture, possibility of mildew development. It's only been about a week of using this meter, but I think it is essential in attempting to control the RH and mildew within your home. Concerned about the electrical consumption of whatever mildew device I utilize, so trying various other processes to see if these work before resorting to a dehumidifier. The hanging Damp Rid fragance free collects a lot of liquid in its pouch, but the RH in the closet has not decreased noticeably at all. The heating rods do not lower the RH quickly and I may need to give this more time. If you want to systematically work towards getting rid of your mildew/mold problems, you should seriously consider getting this instrument.

## Features

- PROGRAMMABLE HUMIDITY ALERTS: Take total control of your environment with customizable high and low visual and audible alarms. This smart feature ensures you are immediately notified if moisture levels drift outside your safe zone, preventing damage.
- INTEGRATED DEW POINT CALCULATION: Stop guessing about condensation risks with a dedicated dew point display. This is a game-changer for monitoring basements and warehouses where moisture buildup can lead to mold or structural damage issues.
- PRECISION FIELD CALIBRATION: Ensure long-term accuracy with the built-in calibration adjustment pot. Unlike disposable sensors, this professional-grade meter allows you to re-zero the humidity readings for reliable data year after year.
- TRIPLE DISPLAY LCD: Monitor everything at once with a large, easy-to-read screen that shows humidity, temperature, and dew point simultaneously. No more scrolling through menus—get all your vital environmental insights at a single glance.
- FLEXIBLE MOUNTING OPTIONS: Adapt this monitor to any space using the built-in swivel stand or wall-mount bracket. It is the perfect companion for cigar humidors, plant nurseries, laboratories, and server rooms where climate stability is critical.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000GFCN1I |
| Battery Description | Alkaline |
| Best Sellers Rank | #417,830 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #41 in Humidifier Humidity Meters #574 in Humidifier Accessories |
| Brand | Extech Instruments |
| Brand Name | Extech Instruments |
| Color | White |
| Customer Reviews | 4.2 out of 5 stars 262 Reviews |
| Global Trade Identification Number | 00793950458150, 04016138375534 |
| Included Components | Built-in Stand, Wall Mount Bracket, 1 AAA battery |
| Item Length | 4.3 Inches |
| Item Weight | 0.19 Kilograms |
| Manufacturer | Extech |
| Model | 445815 |
| Mounting Type | Wall Mount |
| Operating Humidity | 10 to 99% RH |
| Part Number | 445815 |
| Temperature Accuracy | 1 degree Celsius |
| Temperature Reading Accuracy | plus_minus_1_degree_celsius |
| UPC | 885866191235 793950458150 |
| Unit Count | 1.0 Count |
| Upper Temperature Range | 140 Degrees Fahrenheit |
| Voltage | 1.5 Volts |
| Warranty Description | 1 Year Parts and Labor |

## Product Details

- **Battery Description:** Alkaline
- **Brand:** Extech Instruments
- **Color:** White
- **Item Weight:** 0.19 Kilograms
- **Mounting Type:** Wall Mount

## Images

![445815 - Image 1](https://m.media-amazon.com/images/I/61IzukYZWCL.jpg)
![445815 - Image 2](https://m.media-amazon.com/images/I/716R21jd3GL.jpg)
![445815 - Image 3](https://m.media-amazon.com/images/I/71gWHX9YtdL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: Is two degrees hotter normal for this thermometer.  The humidity is good but checkiing normal for the product.**
A: Not normal. Accurate to within a half-degree when calibrated.

**Q: How do we select either of the 2 Certificate of Traceablitity options?  Or is this already in the box?**
A: The product does not come with a certificate & it's a hassle to obtain.  The Extech website notes the following:Is my meter calibrated out of the box? How often should it be calibrated? Does it come with a calibration certificate? How & where can I get my meter calibrated?All Extech products are factory calibrated prior to shipment. This calibration is valid for one year. An annual factory calibration is recommended. Extech does not include calibration certificates with our products. NIST calibrations with data can be purchased for an additional charge for most products. To send your meter to be NIST calibrated please contact our return department for a return authorization number and other return information.

**Q: Can it display the temperature in Celsius unit?**
A: Yes! Good question, and I did not know, so I dug out my instructions. I am now looking at those and my unit and there is a switch in the battery compartment below the battery for degrees F and degrees C. Using this, I have 78.6 F showing as 25.9 C. BTW, I'm actually considering getting another one for my car and work. It will need some protection, like a plastic sandwich box with some paper towel padding, but that will do it for me. Hope you enjoy yours as much as I like mine.

**Q: May i know does this item come together with a calibration certificate?**
A: The calibration certificate is not included; it can be ordered together with 17030-28 calibration.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Have two, have been using both for years and years
*by J***E on June 17, 2025*

We have two and have used them for years to measure both dryness and moisture. The readings differ by just a little bit. I think I returned a third one for being much further off calibration, so it may take a couple rounds when you purchase these. The device allows detach the sensor from the base and thus some ability to measure into places slightly distant from the base. Mostly, though, they reside on furniture and measure ambient air humidity. It does a good job of supplementing my dehumidifier readings as well, as those dehumidifier readings can be way off.

### ⭐⭐⭐⭐⭐ Perfect Indicator
*by C***R on May 11, 2013*

Purchased this instrument to monitor the humidity in our closets and walk-in closet in our home. Some of the rooms within our house have more mildew than others. Took comparison readings of the different rooms and closets. Tried the heating rods in the closets to determine whether these rods help in lowering the relative humidity. Tried running the central A/C system on DRY mode in one of the bedrooms to see whether the A/C works in lowering the RH (relative humidity) and it does. Love the large digital readout and simplicity of use. Moved the instrument among the closets in different rooms of the house to get an idea of the humidity in these areas and to confirm the likelihood and severity of moisture, possibility of mildew development. It's only been about a week of using this meter, but I think it is essential in attempting to control the RH and mildew within your home. Concerned about the electrical consumption of whatever mildew device I utilize, so trying various other processes to see if these work before resorting to a dehumidifier. The hanging Damp Rid fragance free collects a lot of liquid in its pouch, but the RH in the closet has not decreased noticeably at all. The heating rods do not lower the RH quickly and I may need to give this more time. If you want to systematically work towards getting rid of your mildew/mold problems, you should seriously consider getting this instrument.

### ⭐⭐⭐⭐⭐ Nice Humidly Alert and Temp Display
*by D***K on September 16, 2013*

I set mine up for my T room. With the nice large LCD readout at a quick glance I can see what each enclosure's humidity and temperature is. I don't use the alarm features since I have a room humidifier control system that has alerts for the overall room humidity. Overall, this is a nice, easy to ready, humidity and Temperature display + options with audible alarms for Max and Minimum thresholds. I have one sitting on each of my enclosures with the probe inserted to measure humidity. Works Great. Would like to have seen included a probe attachment; such as a suction cup for glass and or a hook for wire enclosures.

## Frequently Bought Together

- Extech Digit Thermometer
- Extech 445580 Humidity and Temperature Pen Sized Meter with Pocket Clip

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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-05-04*